Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
sach ky » sach y, sach ty, sach kem
dai cuu » dai cua, dai huu
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sac ky)) ((lang xa) or (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) ((lang xa) OR (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) ((lang xa) or (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) ((lang xa) or (lang ha)) hoi. hieu va cam duc va thanh dai cuu tre*.